1
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Ramesh NG. From Glycals to Nitrogen Heterocycles and Carbocycles via "Cleavage-Intramolecular Recombination Strategy". CHEM REC 2021; 21:2930-2957. [PMID: 34472196 DOI: 10.1002/tcr.202100187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 08/06/2021] [Accepted: 08/11/2021] [Indexed: 12/17/2022]
Abstract
Glycals (carbohydrate enol-ethers) have enjoyed profound applications in organic synthesis for more than a century. They not only serve as versatile glycosyl donors or as substrates for Ferrier rearrangement, but also find extensive synthetic applications especially as a "chiral pool" for accomplishing the synthesis of a variety of natural and biologically important compounds. As cyclic enol ethers, they demonstrate high reactivity and are among the most and variously transformable monosaccharide derivatives. The uniqueness of the reactivity of glycals is that they can be synthetically tuned to get a library of derivatives through stereo- and regioselective introduction of a variety of functional groups at C1, C2, C3 as well as C4 carbons of the sugar. We have developed a practical approach for stereoselective mono- and diamination of glycals and over the years utilized these scaffolds for the synthesis of a variety of biologically important nitrogen heterocycles and carbocycles through a "Diversity Oriented Approach". Our synthetic strategy in this direction mainly relied on the cleavage of ring O-C bond of the sugar followed by an "intramolecular recombination" reaction. Utilizing this strategy, we have accomplished the synthesis of several biologically important natural products, their analogues and related unnatural derivatives. Examples of such compounds reported from our group include polyhydroxypyrrolidines, DMDP, anisomycin, steviamine, pochonicine, conduramines, bulgecinine, aminocyclitols, azepanes, 4-hydroxy-D-proline, azanucleosides and their analogues. A personal account highlighting these syntheses is presented here.
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Affiliation(s)
- Namakkal G Ramesh
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India
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2
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Ariztia J, Chateau A, Boura C, Didierjean C, Lamandé-Langle S, Pellegrini Moïse N. Synthesis of anti-proliferative [3.3.0]furofuranone derivatives by lactonization and functionalization of C-glycosyl compounds. Bioorg Med Chem 2021; 45:116313. [PMID: 34325324 DOI: 10.1016/j.bmc.2021.116313] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 07/08/2021] [Accepted: 07/15/2021] [Indexed: 10/20/2022]
Abstract
The [3.3.0]furofuranone structure is found in numerous families of biologically active natural products. We took advantage of the stereodiversity afforded by carbohydrate derivatives to prepare several compounds structurally similar to goniofufurone and crassalactones which are natural cytotoxic agents. We designed and synthesized several stereoisomers of these natural compounds via lactonization of C-glycosyl compounds bearing an hydroxyl on position 4 and a methyl ester on the pseudo-anomeric positionThe reactivity of this bicyclic moiety was explored through etherification of hydroxyls in position 5 and 7 and various substituants (halogen, phenyl, benzyl, cynanmoyl) were introduced. The anti-proliferative properties of these mimics were then evaluated on various cancer cell lines and two compounds 24 and 35 demonstrated IC50 value of 1.34 µM (U251) and 7.60 µM (U87) respectively.
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Affiliation(s)
- Julen Ariztia
- Université de Lorraine, CNRS, L2CM, F-5400 Nancy, France
| | - Alicia Chateau
- Université de Lorraine, CNRS, CRAN, F-54000 Nancy, France
| | - Cédric Boura
- Université de Lorraine, CNRS, CRAN, F-54000 Nancy, France
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3
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Hernández-Guerra D, Kennedy AR, León EI, Martín Á, Pérez-Martín I, Rodríguez MS, Suárez E. Synthetic Approaches to Phosphasugars (2-oxo-1,2-oxaphosphacyclanes) Using the Anomeric Alkoxyl Radical β-Fragmentation Reaction as the Key Step. J Org Chem 2020; 85:4861-4880. [PMID: 32174121 DOI: 10.1021/acs.joc.0c00059] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The anomeric alkoxyl radical β-fragmentation (ARF) of carbohydrates possessing an electron-withdrawing group (EWG) at C2, promoted by PhI(OAc)2/I2, gives rise to an acyclic iodide through which a pentavalent atom of phosphorus can be introduced via the Arbuzov reaction. After selective hydrolysis and subsequent cyclization, the phosphonate or phosphinate intermediates can be converted into 2-deoxy-1-phosphahexopyranose and 2-deoxy-1-phosphapentopyranose sugars. The ARF of carbohydrates with an electron-donor group (EDG) at C2 proceeds by a radical-polar crossover mechanism, and the cyclization occurs by nucleophilic attack of a conveniently positioned phosphonate or phosphinate group to the transient oxocarbenium ion. This alternative methodology leads to 5-phosphasugars with a 4-deoxy-5-phosphapentopyranose framework. The structure and conformation of the 2-oxo-1,2-oxaphosphinane and 2-oxo-1,2-oxaphospholane ring systems in different carbohydrate models have been studied by NMR and X-ray crystallography.
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Affiliation(s)
- Daniel Hernández-Guerra
- Sı́ntesis de Productos Naturales, Instituto de Productos Naturales y Agrobiologı́a del CSIC, Carretera de La Esperanza 3, 38206, La Laguna, Tenerife, Spain
| | - Alan R Kennedy
- WestCHEM Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, Scotland, U.K
| | - Elisa I León
- Sı́ntesis de Productos Naturales, Instituto de Productos Naturales y Agrobiologı́a del CSIC, Carretera de La Esperanza 3, 38206, La Laguna, Tenerife, Spain
| | - Ángeles Martín
- Sı́ntesis de Productos Naturales, Instituto de Productos Naturales y Agrobiologı́a del CSIC, Carretera de La Esperanza 3, 38206, La Laguna, Tenerife, Spain
| | - Inés Pérez-Martín
- Sı́ntesis de Productos Naturales, Instituto de Productos Naturales y Agrobiologı́a del CSIC, Carretera de La Esperanza 3, 38206, La Laguna, Tenerife, Spain
| | - María S Rodríguez
- Sı́ntesis de Productos Naturales, Instituto de Productos Naturales y Agrobiologı́a del CSIC, Carretera de La Esperanza 3, 38206, La Laguna, Tenerife, Spain
| | - Ernesto Suárez
- Sı́ntesis de Productos Naturales, Instituto de Productos Naturales y Agrobiologı́a del CSIC, Carretera de La Esperanza 3, 38206, La Laguna, Tenerife, Spain
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4
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Bhat BA, Rashid S, Sengupta S, Mehta G. Recent Advances in Total Synthesis of Bioactive Furo[3,2‐
b
]furanone Natural Products. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.201900714] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Bilal A. Bhat
- CSIR-Medicinal Chemistry DivisionIndian Institute of Integrative Medicine Sanatnagar-Srinagar 190005 India
- Academy of Scientific and Innovative Research India
| | - Showkat Rashid
- CSIR-Medicinal Chemistry DivisionIndian Institute of Integrative Medicine Sanatnagar-Srinagar 190005 India
- Academy of Scientific and Innovative Research India
| | | | - Goverdhan Mehta
- School of ChemistryUniversity of Hyderabad Hyderabad 500046 India
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5
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Gwon GB, Jung HG, Seu YB. Chiral Synthesis of Natural (+)‐
endo
‐Brevicomin with Enzymatic Reaction from
l
‐Tartaric Acid. B KOREAN CHEM SOC 2019. [DOI: 10.1002/bkcs.11893] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Gi Baek Gwon
- School of Life Sciences and BiotechnologyKyungpook National University Daegu Republic of Korea
| | - Hwan Gyu Jung
- School of Life Sciences and BiotechnologyKyungpook National University Daegu Republic of Korea
| | - Young Bae Seu
- School of Life Sciences and BiotechnologyKyungpook National University Daegu Republic of Korea
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6
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A concise synthesis of (+)-goniofufurone, (+)-7-epi-goniofufurone, (+)-crassalactones B and C. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.06.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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7
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Harit VK, Ramesh NG. Ring closing metathesis (RCM) approach to the synthesis of conduramine B-2, ent-conduramine F-2, aminocyclopentitol and trihydroxyazepane. Org Biomol Chem 2019; 17:5951-5961. [PMID: 31166343 DOI: 10.1039/c9ob01010f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The syntheses of conduramine B-2, ent-conduramine F-2, aminocyclopentitol and trihydroxyazepane were accomplished from a common precursor, through a divergent approach using ring closing metathesis (RCM) as the key step. Tri-O-benzyl-d-glucal was converted to 3,4,6-tri-O-benzyl-1,2-dideoxy-2-iodo-1-p-toluenesulfonamido-α-d-mannose. Exposure to NaBH4 in MeOH resulted in a facile 1,2-transposition of the -NHTs group with concomitant glycosylation to give methyl 3,4,6-tri-O-benzyl-2-deoxy-2-p-toluenesulfonamido-β-d-glucoside, which was converted into methyl 6-deoxy-6-iodo-glucoside in three steps. Zinc-mediated Vasella's rearrangement proceeded smoothly to give the pluripotent formyl-olefin, possessing both electrophilic and nucleophilic sites, which was used as a common precursor in our diversity-oriented approach. Vinylation of the carbonyl group followed by RCM and subsequent deprotection resulted in the successful synthesis of conduramine B-2 and ent-conduramine F-2 for the first time. On the other hand, the Wittig reaction of the formyl-olefin affords the diene that undergoes Grubbs' I catalyzed RCM and deprotection/reduction to provide 3-amino-cyclopentan-1,2-diol. Utilizing the nucleophilic site at the nitrogen of the common precursor, base mediated N-allylation was carried out to obtain the corresponding diene that underwent a smooth RCM to afford trihydroxyazepane.
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Affiliation(s)
- Vimal Kant Harit
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi - 110016, India.
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8
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Kovačević I, Popsavin M, Rodić MV, Kojić V, Popsavin V. Asymmetric synthesis of the cytotoxic lactone (+)-cardiobutanolide and two novel analogues. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.01.059] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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9
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Conformationally restricted goniofufurone mimics with halogen, azido or benzoyloxy groups at the C-7 position: Design, synthesis and antiproliferative activity. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.07.046] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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Fernandes RA, Kattanguru P, Halle MB, Kunkalkar RA. Evolution of Total Syntheses of β-Hydroxy-γ-Lactones: Cardiobutanolide and Hagen's Gland Lactones. ChemistrySelect 2017. [DOI: 10.1002/slct.201700862] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Rodney A. Fernandes
- Department of Chemistry Indian; Institute of Technology Bombay Powai; Mumbai 400076, Maharashtra India
| | - Pullaiah Kattanguru
- Department of Chemistry Indian; Institute of Technology Bombay Powai; Mumbai 400076, Maharashtra India
| | - Mahesh B. Halle
- Department of Chemistry Indian; Institute of Technology Bombay Powai; Mumbai 400076, Maharashtra India
| | - Rupesh A. Kunkalkar
- Department of Chemistry Indian; Institute of Technology Bombay Powai; Mumbai 400076, Maharashtra India
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11
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Karadžić MŽ, Lončar DM, Benedeković G, Kovačević I, Popsavin V, Kovačević SZ, Jevrić LR, Podunavac-Kuzmanović SO. A comparative study of chromatographic behavior and lipophilicity of selected natural styryl lactones, their derivatives and analogues. Eur J Pharm Sci 2017; 105:99-107. [PMID: 28487143 DOI: 10.1016/j.ejps.2017.05.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 05/03/2017] [Accepted: 05/03/2017] [Indexed: 10/19/2022]
Abstract
This study is based on the analyses of the retention behavior of selected natural styryl lactones and their synthetic analogues in reversed-phase high-performance liquid chromatography. Chromatographic separations were achieved applying ZORBAX SB-C18 column and two different mobile phases: methanol-water and acetonitrile-water. Chromatographic lipophilicity of the analyzed compounds was defined by logk0 constant and correlated with in silico molecular descriptors. According to the statistical validation parameters, obtained results indicate that the presented linear and multiple quantitative structure-retention relationship models can successfully predict the chromatographic lipophilicity of structurally similar compounds. Hierarchical cluster analyses (HCA) was applied in order to group similar compounds according to their chromatographic and in silico lipophilicity. It can be concluded that chromatographic systems with methanol-water were better for modelling of logk0. Modelling was performed in order to characterize compounds regarding their lipophilicity profiles as future drug candidates.
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Affiliation(s)
- Milica Ž Karadžić
- University of Novi Sad, Faculty of Technology Novi Sad, Bulevar cara Lazara 1, 21000 Novi Sad, Serbia.
| | - Davor M Lončar
- University of Novi Sad, Faculty of Technology Novi Sad, Bulevar cara Lazara 1, 21000 Novi Sad, Serbia
| | - Goran Benedeković
- University of Novi Sad, Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia
| | - Ivana Kovačević
- University of Novi Sad, Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia
| | - Velimir Popsavin
- University of Novi Sad, Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia
| | - Strahinja Z Kovačević
- University of Novi Sad, Faculty of Technology Novi Sad, Bulevar cara Lazara 1, 21000 Novi Sad, Serbia
| | - Lidija R Jevrić
- University of Novi Sad, Faculty of Technology Novi Sad, Bulevar cara Lazara 1, 21000 Novi Sad, Serbia
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12
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Pal P, Shaw AK. The evolution of comprehensive strategies for furanoid glycal synthesis and their applications. RSC Adv 2017. [DOI: 10.1039/c6ra28598h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Cyclic enol ether frameworks, especially stereochemically pure furanoid and pyranoid glycals are well known highly functionalized chiral building blocks.
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Affiliation(s)
- Pinki Pal
- Division of Medicinal & Process Chemistry
- CSIR- Central Drug Research Institut
- Lucknow-226 031
- India
| | - Arun K. Shaw
- Division of Medicinal & Process Chemistry
- CSIR- Central Drug Research Institut
- Lucknow-226 031
- India
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13
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Paecilonic acids A and B, bicyclic fatty acids from the jellyfish-derived fungus Paecilomyces variotii J08NF-1. Bioorg Med Chem Lett 2016; 26:2220-3. [DOI: 10.1016/j.bmcl.2016.03.057] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Revised: 03/11/2016] [Accepted: 03/15/2016] [Indexed: 11/30/2022]
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14
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Ralph M, Ng S, Booker-Milburn KI. Short Flow-Photochemistry Enabled Synthesis of the Cytotoxic Lactone (+)-Goniofufurone. Org Lett 2016; 18:968-71. [DOI: 10.1021/acs.orglett.6b00067] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Michael Ralph
- School
of Chemistry, University of Bristol, Cantock’s Close, Bristol, BS8 1TS, U.K
| | - Sean Ng
- Syngenta U.K.,
Jealott’s Hill International Research Centre, Bracknell, Berkshire RG42 6EY, U.K
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15
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Das P, Kundooru S, Shaw AK. ‘Chiron’ approach to stereoselective synthesis of sphinganine and unnatural safingol, an antineoplastic and antipsoriatic agent. RSC Adv 2016. [DOI: 10.1039/c5ra27342k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Highly stereoselective total syntheses of sphinganine 1 and antineoplastic and antipsoriatic drug safingol 17 have been demonstrated.
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Affiliation(s)
- Pintu Das
- Division of Medicinal and Process Chemistry
- CSIR-Central Drug Research Institute
- Lucknow-226031
- India
| | - Somireddy Kundooru
- Division of Medicinal and Process Chemistry
- CSIR-Central Drug Research Institute
- Lucknow-226031
- India
| | - Arun K. Shaw
- Division of Medicinal and Process Chemistry
- CSIR-Central Drug Research Institute
- Lucknow-226031
- India
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16
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Abstract
A convergent synthesis of macrolide natural product (−)-A26771B starting from d-glucal is reported. Key features of this synthesis involve Ferrier rearrangement, cross metathesis of chiral fragments 3 and 4 and Yamaguchi macrolactonization.
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Affiliation(s)
- Puli Saidhareddy
- Medicinal and Process Chemistry Division
- CSIR-Central Drug Research Institute (CDRI)
- Lucknow-226031
- India
| | - Arun K. Shaw
- Medicinal and Process Chemistry Division
- CSIR-Central Drug Research Institute (CDRI)
- Lucknow-226031
- India
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17
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Kundooru S, Das P, Meena S, Kumar V, Siddiqi MI, Datta D, Shaw AK. Substrate and stereocontrolled iodocycloetherification of highly functionalized enantiomerically pure allylic alcohols: application to synthesis of cytotoxic 2-epi jaspine B and its biological evaluation. Org Biomol Chem 2015; 13:8241-50. [DOI: 10.1039/c5ob01123j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
A mechanistic study on iodocycloetherification of enantiopure allylic alcohols is established. Its application to synthesis of marine cytotoxic 2-epi jaspine B has been demonstrated.
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Affiliation(s)
- Somireddy Kundooru
- Division of Medicinal and Process Chemistry
- CSIR-Central Drug Research Institute
- Lucknow
- India
| | - Pintu Das
- Division of Medicinal and Process Chemistry
- CSIR-Central Drug Research Institute
- Lucknow
- India
| | - Sanjeev Meena
- Biochemistry Division
- CSIR-Central Drug Research Institute
- Lucknow
- India
| | - Vikash Kumar
- Molecular and Structural Biology Division
- CSIR-Central Drug Research Institute
- Lucknow
- India
| | - Mohammad Imran Siddiqi
- Molecular and Structural Biology Division
- CSIR-Central Drug Research Institute
- Lucknow
- India
| | - Dipak Datta
- Biochemistry Division
- CSIR-Central Drug Research Institute
- Lucknow
- India
| | - Arun K. Shaw
- Division of Medicinal and Process Chemistry
- CSIR-Central Drug Research Institute
- Lucknow
- India
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18
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Gade NR, Iqbal J. A Common Synthetic Protocol for the Cyclic and Acyclic Core of Migrastatin, Isomigrastatin, and Dorrigocin via a Chiral β-Hydroxy-γ-butyrolactone Intermediate. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402830] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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19
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Conformationally constrained goniofufurone mimics as inhibitors of tumour cells growth: Design, synthesis and SAR study. Eur J Med Chem 2014; 82:449-58. [DOI: 10.1016/j.ejmech.2014.05.081] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Revised: 05/27/2014] [Accepted: 05/31/2014] [Indexed: 11/23/2022]
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20
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Ren J, Liu Y, Song L, Tong R. Scalable Asymmetric Total Syntheses of (+)-Psoracorylifol B and (+)-ent-Psoracorylifol C. Org Lett 2014; 16:2986-9. [DOI: 10.1021/ol501120m] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Jingyun Ren
- Department
of Chemistry, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
| | - Yuan Liu
- Department
of Chemistry, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
| | - Liyan Song
- Department
of Chemistry, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
| | - Rongbiao Tong
- Department
of Chemistry, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
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21
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Saidhareddy P, Ajay S, Shaw AK. ‘Chiron’ approach to the total synthesis of macrolide (+)-Aspicilin. RSC Adv 2014. [DOI: 10.1039/c3ra45530k] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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22
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Fernandes RA, Kattanguru P, Bethi V. Stereoselective inversion of γ-vinyl-γ-butyrolactone under palladium catalysis: application to the synthesis of (+)-exo- and (+)-endo-brevicomins. RSC Adv 2014. [DOI: 10.1039/c4ra00814f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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23
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Heteroannelated and 7-deoxygenated goniofufurone mimics with antitumour activity: Design, synthesis and preliminary SAR studies. Bioorg Med Chem Lett 2013; 23:5507-10. [DOI: 10.1016/j.bmcl.2013.08.069] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Revised: 08/13/2013] [Accepted: 08/14/2013] [Indexed: 11/24/2022]
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24
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Sabitha G, Maheswara Reddy A, Siva Sankara Reddy S, Singh Yadav J. Stereoselective Synthesis of (−)-(1R,1′R,5′R,7′R)-1-Hydroxy-exo-brevicomin and (+)-exo-Brevicomin from 3,4,6-Tri-O-acetyl-D-glucal. Helv Chim Acta 2013. [DOI: 10.1002/hlca.201200611] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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25
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Stereoselective total synthesis of Jaspine B (Pachastrissamine) utilizing iodocyclization and an investigation of its cytotoxic activity. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.tetasy.2013.07.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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26
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Fernandes RA, Kattanguru P. Step-Economic and Protecting-Group-Free Total Synthesis of (+)-Cardiobutanolide. ASIAN J ORG CHEM 2012. [DOI: 10.1002/ajoc.201200130] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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27
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Ghosal P, Shaw AK. A chiron approach to aminocytitols by Petasis-Borono-Mannich reaction: formal synthesis of (+)-conduramine E and (-)-conduramine E. J Org Chem 2012; 77:7627-32. [PMID: 22900915 DOI: 10.1021/jo300804d] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A chiron approach to a stereoselective route for the synthesis of aminocytitols from carbohydrates is described. The formal synthesis of (+)-conduramine E and (-)-conduramine E was achieved by utilizing this strategy. The key features of the synthetic strategy include one-pot three-component Petasis-Borono-Mannich reaction to introduce the syn-β-amino alcohol functionality of conduramine E and ring-closing metathesis to construct its carbocyclic core. The present synthetic approach paves the way for stereoselective synthesis of several conduramines starting from carbohydrates.
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Affiliation(s)
- Partha Ghosal
- Division of Medicinal and Process Chemistry, CSIR-Central Drug Research Institute, Lucknow 226 001, India
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Francuz J, Srećo B, Popsavin M, Benedeković G, Divjaković V, Kojić V, Bogdanović G, Kapor A, Popsavin V. Novel goniofufurone and 7-epi-goniofufurone mimics from an unexpected titanium-mediated displacement process. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.01.121] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Kumar V, Das P, Ghosal P, Shaw AK. Syntheses of (−)-gabosine A, (+)-4-epi-gabosine A, (−)-gabosine E, and (+)-4-epi-gabosine E. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.04.082] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Ghosal P, Sharma D, Kumar B, Meena S, Sinha S, Shaw AK. Diastereoselective one-pot Wittig olefination–Michael addition and olefin cross metathesis strategy for total synthesis of cytotoxic natural product (+)-varitriol and its higher analogues. Org Biomol Chem 2011; 9:7372-83. [DOI: 10.1039/c1ob06039b] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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